Pattern wheel drive for warp knitting machines



E. H. WIRTH Sept. 20, 19381 PATTERN WHEEL DRIVE FOR WARP KNITTINGMACHINES Filed April 5. 1958 3 Sheets-Sheet l Sept. 20, 1938; E, H. MRTH2,130,979

PATTERN WHEEL DRIVE FOR WARP KNITTING MACHINES s Sheets-Sheet 2 FiledApril 5, 1958 Sept. 20, 1938. E. H. WlR TH PATTERN WHEEL DRIVE FOR WARPENITTING MACHINES Filed April 5, 1958 3 Sheets-Sheet 5 [/1 1 6/1 for:

IHHHHHI I Hll Patented Sept. 20, 1938 UNITED STATES PATTERN WHEEL DRIVEFOR WARP KNITTING MACHINES Emil Herbert Wirth, Hartmannsdcri', nearChemnitz, Germany Application In 2 Claims.

The present invention relates to a pattern wheel drive for warp knittingmachines.

The known drives of pattern wheels or the like by a worm and a wormwheel hitherto required an exchange ofthe worm and the cooperating wormwheel against other corresponding elements. g

If a certain pattern was to be worked, a worm wheel having a definitenumber of teeth, determined always by the pattern wheel, had to beproduced for this purpose.

If for instance 82 courses are to be worked in two tempi a worm wheelhaving 82 teeth and a double threaded worm are to be provided. To workthis lap in three tempi, the worm and worm wheel must be exchangedagainst a three threaded gear. Any further division of the notched discthen requires the use of the corresponding worm wheel and worm.

The above disadvantages are removed by the pattern wheel drive formingthe subject matter of the invention. The object aimed at is obtained bythe fact that the transmission from the cam shaft to the worm iseffected by intermediate gear wheels adjustably arranged upon aregulating device. The bolt carrying the intermediate wheels may beadjusted in a radial slot of the regulating device. The latter may beoscillated on its pivot. Mounted on this pivot is a toothed wheelkinematioally connected to the wheel of the cam shaft. By swinging oroscillating the regulating device and by shifting the bolt carrying theintermediate gear wheels, the adjustment of each pair of intermediatewheels can be effected in such a manner, 5 that the one toothed wheelengages the toothed wheel driven by the cam shaft, whereas the othertoothed wheel is in engagement with a toothed wheel mounted upon theshaft of the worm.

In the accompanying drawings the invention is shown by way of example.

I In these drawings:

Fig. 1 is a front elevation of a pattern drive having a worm and a wormwheel,

Fig. 2 is a side elevation of this drive, Fig. 3 is a side elevation insection according to the line A-A of Fig. 2,

Fig. 4 shows a plan view partly in section, and Fig. 5 shows a detail insectional view. Fixed to the frame i of the machine is a box the wall 2of which has an opening through which extends the cam shaft 3 into thebox. In the interior of the box a toothed wheel 4 is mounted upon thecam shaft. iournalled in the wall 2 and in the opposite wall 55 I andmounted on this shaftis an intermediate A shaft 6 is April 5, 1938,Serial No. 200,234 Germany June 19, 1937 (Cl. 6M6) driving gear 1engaging the toothed wheel Q. Mounted at the wall 51s a further casingportion the wall 8 of which carries a reinforcing member 8 connected toa bearing sleeve l0. Journalled in the reinforcing member and thebearing sleeve i0 is a shaft ii the end of which extending into the boxcarries a toothed wheel i2 engaging the intermediate gear wheel 1. Theend of the shaft ii protruding from the bearing sleeve in and extendinginto the above mentioned casing carrice a small gear wheel I3. I

Shifted upon the bearing sleeve in is a regulating device provided withtwo guide slots l4, l5 arranged concentrically to the bearing sleeve Illand a radially extending slot it. By means of 15 two screws l1, l8mounted in the reinforcing member 9 and extending through the guideslots I4, I! the regulating device may be fixed in any desired positionby means of nuts 19, 20.

Adjustabiy mounted in the radially extending so slot ii of theregulating device is a head bolt 2i. Shifted upon the latter is a sleeve22 which by means of a nut 23 may be pressed against the regulatingdevice, thereby fixing the latter in an adjusted position. Loosely androtatably mounted 25 upon the sleeve 22 is another sleeve 24 carryingthe intermediate wheels 25, 26 connected together and to the sleeve 24by a wedge 21.

The wheel 25 engages the small toothed wheel i3 while the other gearwheel 26 engages a 30 toothed wheel 28 mounted upon the end of the shaft28 extending into the casing and carrying the worm 30 which drives theworm wheel 2| fixed upon the shaft 32 carrying the notched disc. or thelike. 85

By means of the gearwheel 4 mounted upon the cam shaft 3, the toothedwheel 28 mounted upon the worm shaft and thereby the worm 30 and theworm wheel 3| are driven by way of the intermediate driving gear I, thegear wheel 40 i2, the small gear wheel i3, and the intermediate gearwheels 25 and 26.

To obtain the drive for another division of the notched wheels or thelike it is only necessary to exchange the intermediate wheels 25, 28mounted upon the sleeve 24. By shifting the head bolt 2| in the radialslot of the regulating device at the one hand and by turning theregulating device around its bearing sleeve after loosening the nuts I9,20, the newly mounted intermediate wheels 25, 26 may be adjusted in sucha manner, that one of them again-engages the small gear wheel l3,whereas the other engages the gear wheel 28. Depending upon theproportion or the size of the two intermediate 66 toothed wheels '25,26, the driveof the worm wheel maybe changed to move the notcheddisc inaccordance with the desired division. The

same worm and the same worm wheel always are used and an exchange ofthem isno longer required.

What I. claim is: 1. In apattern wheel drive for warp knitting machineshaving exchangeable" intermediate 10 toothed wheels, a casing, a bearingsleeve ar-- ranged in said casing, a shaft journalled in saidv bearingsleeve, a toothed wheel carried by said shaft, an intermediate drivinggear wheel kinematically connected to atoothed wheel mounted 15 upon acam shaft, aregulating device having two concentric guide slots and aradial slot shifted upon said bearing sleeve, a head bolt adjustablyarranged in' said radial slot, a sleeve.

fixed to said head bolt,'two toothed wheels carried by saidsleeve andengaging a small toothed gear mounted on said bearing sleeve and atoothed wheel fixed upon a worm shaft respectively. v

2. In a pattern wheel drive for warp knitting machines havingexchangeable intermediate toothed wheels, a casing, a bearing sleeve ar-7 bolt adjustably arranged in said radial slot, screw bolts fixed insaid reinforcing member and extending through said concentric guideslots of said regulating device, nuts engaging said screw bolts to fixsaid regulating device in any desired position, a sleeve fixed to saidhead bolt, two toothed wheels carriedby said sleeve and engaging a smalltoothed gear mounted on said bearing sleeve and a toothed wheel fixedupon a worm shaft respectively.

MI HERBERT wrR'rH.

